by Mr Link » May 11, 2022, 9:57 pm
Of course I can't seem to find any photos right now, but in the past have seen photos of several large winches at the yard. Probably salvaged towing winches from tugs. The lines are often run through multiple blocks to increase their pulling power, and they are tied to ground anchors behind the winches, and via anchor chain to the vessel being pulled.
Currently, I think they may be using huge hydraulic chain pullers, meant to engage anchor chain. They pull the distance of a link or two and then take a new bite on the chain.
Moran Iron Works surprisingly was able to pull the tug Sarah Spencer up on shore (on rollers) using only end loaders and no mechanical advantage (blocks, etc.) But the had access to some of the largest end loaders made, being they did the work near the quarry at Rogers City.
Of course I can't seem to find any photos right now, but in the past have seen photos of several large winches at the yard. Probably salvaged towing winches from tugs. The lines are often run through multiple blocks to increase their pulling power, and they are tied to ground anchors behind the winches, and via anchor chain to the vessel being pulled.
Currently, I think they may be using huge hydraulic chain pullers, meant to engage anchor chain. They pull the distance of a link or two and then take a new bite on the chain.
Moran Iron Works surprisingly was able to pull the tug Sarah Spencer up on shore (on rollers) using only end loaders and no mechanical advantage (blocks, etc.) But the had access to some of the largest end loaders made, being they did the work near the quarry at Rogers City.